[PATCH v3 14/19] iommu: exynos: add support for runtime_pm

Marek Szyprowski
2014-11-19T11:15:43Z

This patch fixes support for runtime power management for SYSMMU
controllers, so they are enabled when master device is attached.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
---
drivers/iommu/exynos-iommu.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 77dec32c59ef..27742c4d5a76 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -696,6 +696,7 @@ static int exynos_iommu_attach_device(struct iommu_domain *domain,
return -ENODEV;

list_for_each_entry(data, &owner->clients, owner_node) {
+ pm_runtime_get_sync(data->sysmmu);
ret = __sysmmu_enable(data, pagetable, domain);
if (ret >= 0) {
data->master = dev;
@@ -737,6 +738,7 @@ static void exynos_iommu_detach_device(struct iommu_domain *domain,
data->master = NULL;
list_del_init(&data->domain_node);
}
+ pm_runtime_put(data->sysmmu);
found = true;
}
}
--
1.9.2